The Large Hadron Collider (LHC)--the world's largest, most ambitious atom smasher--hardly needs to be oversold. But even before construction ceased on the $10 billion, 17-mile-long, underground particle accelerator, some people had convinced themselves the device would end the world. Then the accidents and mechanical failures began one after another, fostering even wackier theories about time-traveling saboteurs.

Now scientists have announced that the repairs are completed, and on Monday, the first successful particle collisions were reported. As of yet, the world remains intact. Some bloggers reacted to the news by heaping derision on the fear-mongers, others rekindling hope for new advances in physics:

A Year to Warm UpRobert Evans summarized the underlying aim of the LHC for Reuters:"Among enduring mysteries that researchers hope to unravel are the black holes in the universe, what anti-matter is and whether there is a Higgs Boson. The Boson is a theoretical particle thought to give matter its mass, enabling it to come together." However, he was also quick to point out that scientists behind the project were a patient bunch: "It may not be until 2011 that what is dubbed the 'Big Bang Machine' -- the Large Hadron Collider (LHC) -- straddling the Swiss-French border at the CERN research center will hit its top velocity, physicist Steve Myers added."

The Theory of Everything New Scientist contributing editor Anil Ananthaswamy offers his take on "what the LHC is really looking for." He challenges the the common perception that the ultimate goal of the project is to create a Higgs Boson particle, thus verifying the standard model of quantum physics "But then particle physics will be at a dead end, with no clues where to turn next." Instead, he says "If the theorists are right, before it ever finds the Higgs, the LHC will see the first outline of something far bigger: the grand, overarching theory known as supersymmetry. SUSY, as it is endearingly called, is a daring theory that doubles the number of particles needed to explain the world. And it could be just what particle physicists need to set them on the path to fresh enlightenment."

Be Not Afraid Guardian contributor Euclides Montes used the occasion of the Hadron Collider restarting and its accompanying detractors to ponder the queasiness that has historically accompanied all scientific exploration. Beginning with the discovery of fire, he waxes philosophic about managing fear at the far reaches of scientific inquiry: "This deep-rooted fear of what lies just beyond us – both physically and intellectually – has characterised humanity's thirst for knowledge as well as its reaction to the advancements the quest has brought with it…So rather than being consumed by the fear, we should instead be using it to spur us on in our search for knowledge and I, for one, will be eagerly following the events on Friday. I hope LHC kicks off with a bang … a big bang."

The End of the Word Means The Beginning of A Whole New Verb Tense Engadget's Ross Miller mocks the idea that LHC could destroy the world something, or that from the future sabotaged it to prevent such a catastrophe: "Whether or not we will have had total destruction as an unfortunate result of the device remains to be seen, but should the future find a way to either cease to exist or travel to the past in some time-bending paradox, we only hope linguists and physicists can work together and figure out the proper verb conjugations for this brave new world."

Think Bigger Daily Galaxy blogger Luke McKinney starts his post off with a swipe at the distractable mainstream media: "Some scientists are already looking beyond the Large Hadron Collider and onto the next generation of ultimega-atom-smasher. That's because scientists actually plan things and can concentrate for longer than four seconds, unlike the mass media which reports on them." He goes on to explain that the experiments conducted at the LHC will actually pave the way for newer, more advanced accelerators, including a "muon collider" which would accelerate particles extremely small, extremely unstable "muon" particles. Of course, he admits that there are enormous hurdles before the technology is usable, and even then, there's always the matter of who foots the bill.

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Five days after Hurricane Maria made landfall in Puerto Rico, its devastating impact is becoming clearer.

Five days after Hurricane Maria made landfall in Puerto Rico, its devastating impact is becoming clearer. Most of the U.S. territory currently has no electricity or running water, fewer than 250 of the island’s 1,600 cellphone towers are operational, and damaged ports, roads, and airports are slowing the arrival and transport of aid. Communication has been severely limited and some remote towns are only now being contacted. Jenniffer Gonzalez, the Resident Commissioner of Puerto Rico, told the Associated Press that Hurricane Maria has set the island back decades.

A small group of programmers wants to change how we code—before catastrophe strikes.

There were six hours during the night of April 10, 2014, when the entire population of Washington State had no 911 service. People who called for help got a busy signal. One Seattle woman dialed 911 at least 37 times while a stranger was trying to break into her house. When he finally crawled into her living room through a window, she picked up a kitchen knife. The man fled.

The 911 outage, at the time the largest ever reported, was traced to software running on a server in Englewood, Colorado. Operated by a systems provider named Intrado, the server kept a running counter of how many calls it had routed to 911 dispatchers around the country. Intrado programmers had set a threshold for how high the counter could go. They picked a number in the millions.

The greatest threats to free speech in America come from the state, not from activists on college campuses.

The American left is waging war on free speech. That’s the consensus from center-left to far right; even Nazis and white supremacists seek to wave the First Amendment like a bloody shirt. But the greatest contemporary threat to free speech comes not from antifa radicals or campus leftists, but from a president prepared to use the power and authority of government to chill or suppress controversial speech, and the political movement that put him in office, and now applauds and extends his efforts.

The most frequently cited examples of the left-wing war on free speech are the protests against right-wing speakers that occur on elite college campuses, some of which have turned violent.New York’s Jonathan Chait has described the protests as a “war on the liberal mind” and the “manifestation of a serious ideological challenge to liberalism—less serious than the threat from the right, but equally necessary to defeat.” Most right-wing critiques fail to make such ideological distinctions, and are far more apocalyptic—some have unironically proposed state laws that define how universities are and are not allowed to govern themselves in the name of defending free speech.

A growing body of research debunks the idea that school quality is the main determinant of economic mobility.

One of the most commonly taught stories American schoolchildren learn is that of Ragged Dick, Horatio Alger’s 19th-century tale of a poor, ambitious teenaged boy in New York City who works hard and eventually secures himself a respectable, middle-class life. This “rags to riches” tale embodies one of America’s most sacred narratives: that no matter who you are, what your parents do, or where you grow up, with enough education and hard work, you too can rise the economic ladder.

A body of research has since emerged to challenge this national story, casting the United States not as a meritocracy but as a country where castes are reinforced by factors like the race of one’s childhood neighbors and how unequally income is distributed throughout society. One such study was published in 2014, by a team of economists led by Stanford’s Raj Chetty. After analyzing federal income tax records for millions of Americans, and studying, for the first time, the direct relationship between a child’s earnings and that of their parents, they determined that the chances of a child growing up at the bottom of the national income distribution to ever one day reach the top actually varies greatly by geography. For example, they found that a poor child raised in San Jose, or Salt Lake City, has a much greater chance of reaching the top than a poor child raised in Baltimore, or Charlotte. They couldn’t say exactly why, but they concluded that five correlated factors—segregation, family structure, income inequality, local school quality, and social capital—were likely to make a difference. Their conclusion: America is land of opportunity for some. For others, much less so.

One hundred years ago, a retail giant that shipped millions of products by mail moved swiftly into the brick-and-mortar business, changing it forever. Is that happening again?

Amazon comes to conquer brick-and-mortar retail, not to bury it. In the last two years, the company has opened 11 physical bookstores. This summer, it bought Whole Foods and its 400 grocery locations. And last week, the company announced a partnership with Kohl’s to allow returns at the physical retailer’s stores.

Why is Amazon looking more and more like an old-fashioned retailer? The company’s do-it-all corporate strategy adheres to a familiar playbook—that of Sears, Roebuck & Company. Sears might seem like a zombie today, but it’s easy to forget how transformative the company was exactly 100 years ago, when it, too, was capitalizing on a mail-to-consumer business to establish a physical retail presence.

The foundation of Donald Trump’s presidency is the negation of Barack Obama’s legacy.

It is insufficient to statethe obvious of Donald Trump: that he is a white man who would not be president were it not for this fact. With one immediate exception, Trump’s predecessors made their way to high office through the passive power of whiteness—that bloody heirloom which cannot ensure mastery of all events but can conjure a tailwind for most of them. Land theft and human plunder cleared the grounds for Trump’s forefathers and barred others from it. Once upon the field, these men became soldiers, statesmen, and scholars; held court in Paris; presided at Princeton; advanced into the Wilderness and then into the White House. Their individual triumphs made this exclusive party seem above America’s founding sins, and it was forgotten that the former was in fact bound to the latter, that all their victories had transpired on cleared grounds. No such elegant detachment can be attributed to Donald Trump—a president who, more than any other, has made the awful inheritance explicit.

What the Trump administration has been threatening is not a “preemptive strike.”

Donald Trump lies so frequently and so brazenly that it’s easy to forget that there are political untruths he did not invent. Sometimes, he builds on falsehoods that predated his election, and that enjoy currency among the very institutions that generally restrain his power.

That’s the case in the debate over North Korea. On Monday, The New York Timesdeclared that “the United States has repeatedly suggested in recent months” that it “could threaten pre-emptive military action” against North Korea. On Sunday, The Washington Post—after asking Americans whether they would “support or oppose the U.S. bombing North Korean military targets” in order “to get North Korea to give up its nuclear weapons”—announced that “Two-thirds of Americans oppose launching a preemptive military strike.” Citing the Post’s findings, The New York Times the same day reported that Americans are “deeply opposed to the kind of pre-emptive military strike” that Trump “has seemed eager to threaten.”

National Geographic Magazine has opened its annual photo contest, with the deadline for submissions coming up on November 17.

National Geographic Magazine has opened its annual photo contest for 2017, with the deadline for submissions coming up on November 17. The Grand Prize Winner will receive $10,000 (USD), publication in National Geographic Magazine and a feature on National Geographic’s Instagram account. The folks at National Geographic were, once more, kind enough to let me choose among the contest entries so far for display here. The captions below were written by the individual photographers, and lightly edited for style.

More comfortable online than out partying, post-Millennials are safer, physically, than adolescents have ever been. But they’re on the brink of a mental-health crisis.

One day last summer, around noon, I called Athena, a 13-year-old who lives in Houston, Texas. She answered her phone—she’s had an iPhone since she was 11—sounding as if she’d just woken up. We chatted about her favorite songs and TV shows, and I asked her what she likes to do with her friends. “We go to the mall,” she said. “Do your parents drop you off?,” I asked, recalling my own middle-school days, in the 1980s, when I’d enjoy a few parent-free hours shopping with my friends. “No—I go with my family,” she replied. “We’ll go with my mom and brothers and walk a little behind them. I just have to tell my mom where we’re going. I have to check in every hour or every 30 minutes.”

Those mall trips are infrequent—about once a month. More often, Athena and her friends spend time together on their phones, unchaperoned. Unlike the teens of my generation, who might have spent an evening tying up the family landline with gossip, they talk on Snapchat, the smartphone app that allows users to send pictures and videos that quickly disappear. They make sure to keep up their Snapstreaks, which show how many days in a row they have Snapchatted with each other. Sometimes they save screenshots of particularly ridiculous pictures of friends. “It’s good blackmail,” Athena said. (Because she’s a minor, I’m not using her real name.) She told me she’d spent most of the summer hanging out alone in her room with her phone. That’s just the way her generation is, she said. “We didn’t have a choice to know any life without iPads or iPhones. I think we like our phones more than we like actual people.”

His delicate new song makes the problems of fame shockingly relatable.

If ever there were a time when the world could use more songs about the stresses of being rich and famous, the era of Drake and Taylor Swift 2.0 would not seem to be it. And yet even the most played-out topic can be made interesting again through talent and craftsmanship, as Chance the Rapper reminded America Monday night on The Late Show With Stephen Colbert.

The 24-year-old Chicagoan told Colbert, with whom he recently collaborated on the politically-charged opening medley for the Emmys, that the song he was about to premiere was written entirely in the last few days. On one hand, a quick turnaround might explain the spare sound and straightforward structure of the untitled track. But on the other, it’s mindbendingly impressive if the tune’s bracing poetry and melody wereindeed just tossed-off.